Cruise Control System

DTC P1520 STOP LIGHT SWITCH CIRCUIT

CIRCUIT DESCRIPTION

Detection Item:

When the brake pedal is depressed, the stop light switch sends a signal to the ECM. When the ECM receives this signal, it cancels the cruise control.

A fail-safe function is provided so that the cancel functions normally, even if there is a malfunction in the stop light signal circuit.

The cancel condition are: Battery positive voltage at terminal STP.

When the brake is depressed, battery positive voltage normally is applied to stop light switch to terminal STP of the ECM through the STOP fuse, and the ECM turns the cruise control off.

If the harness connected to terminal STP has an open circuit, terminal STP will have battery voltage and the cruise control will be turned off.

Wiring Diagram:

Step 1 - 2:

Step 3:

INSPECTION PROCEDURE